阅读说明：本技术 一种装配式预制楼板连接系统及其施工方法 (Prefabricated floor slab connecting system and construction method thereof ) 是由 王卫永 王子琦 于 2019-10-24 设计创作，主要内容包括：本发明公开了一种装配式预制楼板连接系统及其施工方法,该施工方法,包括以下步骤：1)在车间绑扎楼板钢筋网片,钢筋网片上预埋有若干纵向受力钢筋,通过若干连接钢筋和套管将两个钢筋网片上的纵向受力钢筋连接；2)浇筑钢筋网片的混凝土形成楼板；3)旋出套管使相互连接的楼板分离,将楼板运输至施工现场；4)在施工现场,将抗剪钢板焊接到钢梁上；5)若干连接钢筋穿过抗剪钢板,连接钢筋的两端通过套管分别与两个楼板上的纵向受力钢筋连接；6)浇筑楼板与钢梁连接处的混凝土。本发明的楼板在节点处有效连接,保证节点连接处的受力性能,同时,预制楼板在车间进行批量制作,在现场吊装和机械连接操作方便,施工速度快,生产效率得以提高。(The invention discloses an assembly type prefabricated floor slab connecting system and a construction method thereof, wherein the construction method comprises the following steps: 1) binding floor slab steel bar meshes in a workshop, pre-embedding a plurality of longitudinal stressed steel bars on the steel bar meshes, and connecting the longitudinal stressed steel bars on the two steel bar meshes through a plurality of connecting steel bars and sleeves; 2) pouring concrete of the reinforcing mesh to form a floor slab; 3) screwing out the sleeve to separate the mutually connected floor slabs, and transporting the floor slabs to a construction site; 4) welding the shear steel plate to the steel beam on a construction site; 5) the connecting steel bars penetrate through the shear resistant steel plates, and two ends of the connecting steel bars are respectively connected with the longitudinal stressed steel bars on the two floor slabs through sleeves; 6) and pouring concrete at the joint of the floor slab and the steel beam. The floor slabs are effectively connected at the joints, so that the stress performance of the joints is ensured, meanwhile, the prefabricated floor slabs are manufactured in batches in a workshop, the on-site hoisting and mechanical connection operation is convenient, the construction speed is high, and the production efficiency is improved.)

1. An assembled precast floor slab connected system which characterized in that: comprises a shear resistant steel plate (1), a steel beam (2), a plurality of connecting steel bars (3), a plurality of sleeves (5) and a floor slab (6);

the upper surface of the steel beam (2) is vertically welded with a shear-resistant steel plate (1), and the longitudinal direction of the steel beam (2) is consistent with the length direction of the shear-resistant steel plate (1); the shear steel plate (1) is provided with a plurality of through holes (101) for the connecting steel bars (3) to pass through, and the connecting steel bars (3) pass through the through holes (101);

floor slabs (6) are arranged on two sides of the steel beam (2), a plurality of longitudinal stress steel bars (4) which are parallel to each other are pre-embedded in the floor slabs (6), two ends of each longitudinal stress steel bar (4) extend out of the floor slabs (6), and each longitudinal stress steel bar (4) corresponds to a connecting steel bar (3) which is coaxial with the longitudinal stress steel bar;

the longitudinal stress steel bars (4) on each floor slab (6) are connected with the coaxial connecting steel bars (3) through sleeves (5).

2. An assembly precast floor slab connection system according to claim 1, wherein: external threads are arranged at two ends of the longitudinal stress steel bar (4), and the length of each external thread is L; external threads are arranged at two ends of the connecting steel bar (3), and the length of each external thread is L/2; the sleeve (5) is provided with internal threads penetrating through two ends of the sleeve, the length of the sleeve (5) is L, and L is more than 0; the external threads of the longitudinal stress steel bar (4) and the connecting steel bar (3) are matched with the internal threads of the sleeve (5).

3. An assembly precast floor slab connection system according to claim 1, wherein: the width of the shear steel plate (1) is the same as the thickness of the floor slab (6); the steel beam (2) is I-shaped steel or H-shaped steel, and the thickness of a web plate of the steel beam (2) is the same as that of the shear steel plate (1).

4. An assembly precast floor slab connection system according to claim 1, wherein: the external diameter of the external thread at the two ends of the connecting steel bar (3) is d₂The external diameter of the external thread at the two ends of the longitudinal stress steel bar (4) is d₂Longitudinal direction of the receiving beltThe diameter of the middle section of the force steel bar (4) is d, then

5. An assembly precast floor slab connection system according to claim 1, wherein: the through hole (101) is a regular hexagon through hole, the cross section of the middle section of the connecting steel bar (3) is a regular hexagon, the side length of the regular hexagon is a, and a is d/2.

6. An assembly precast floor slab connection system according to claim 1, wherein: the length L of the external thread at the two ends of the longitudinal stress steel bar (4) is calculated as follows:

in the formula: d₁The inner diameter of the external thread at the two ends of the longitudinal stress steel bar (4) is in mm; d₂The external diameter of the external thread at the two ends of the longitudinal stress steel bar (4) is in mm; f. of_yIs the tensile strength f of the reinforcing bar_yIn units of MPa N/mm²；f_vFor the shear strength f of the reinforcing bars_vIn units of MPa N/mm²。

7. An assembly precast floor slab connection system according to claim 1, wherein: the through holes (101) in the shear steel plate (1) are arranged in a staggered mode.

8. The construction method of the prefabricated floor slab connection system according to claim 1, wherein: the method comprises the following steps:

1) vertically welding the shear-resistant steel plate (1) to the upper surface of the steel beam (2); the longitudinal direction of the steel beam (2) is consistent with the length direction of the shear steel plate (1), and a plurality of through holes (101) for connecting reinforcing steel bars (3) to pass through are formed in the shear steel plate (1);

2) a plurality of connecting steel bars (3) penetrate through the through holes (101);

3) hoisting two floor slabs (6) to two sides of the steel beam (2); the floor slab (6) is internally embedded with a plurality of longitudinal stress steel bars (4) which are parallel to each other, two ends of each longitudinal stress steel bar (4) extend out of the floor slab (6), each longitudinal stress steel bar (4) corresponds to a connecting steel bar (3) which is coaxial with the longitudinal stress steel bar, and two ends of each longitudinal stress steel bar (4) are sleeved with sleeves (5);

4) connecting the longitudinal stress steel bars (4) on each floor slab (6) with the coaxial connecting steel bars (3) thereof through sleeves (5);

5) and pouring concrete at the joint of the floor slab (6) and the steel beam (2).

9. The construction method of an assembly type precast floor slab connection system according to claim 8, wherein: before the step 1), the method also comprises the step of prefabricating the floor slab (6), and the steps are as follows:

0-1) binding steel bar meshes of a plurality of floors in a workshop, binding a plurality of longitudinal stress steel bars (4) which are parallel to each other on each steel bar mesh, wherein the axial directions of the longitudinal stress steel bars (4) are parallel to the mesh surface of the steel bar mesh, and two ends of each longitudinal stress steel bar (4) extend out of the steel bar mesh;

0-2) arranging a plurality of connecting reinforcing steel bars (3) between two adjacent reinforcing steel bar meshes, wherein two ends of each connecting reinforcing steel bar (3) correspond to longitudinal stress reinforcing steel bars (4) coaxial with the connecting reinforcing steel bar, and two ends of each connecting reinforcing steel bar (3) are respectively connected with the longitudinal stress reinforcing steel bars (4) on the two reinforcing steel bar meshes through sleeves (5);

0-3) pouring concrete for each reinforcing mesh to form a floor slab (6), wherein two ends of the longitudinal stress reinforcing steel bars (4) extend out of the floor slab (6);

0-4) after the concrete strength reaches the standard, disassembling the sleeve (5) at the joint to separate the two mutually connected floor slabs (6);

0-5) transporting the prefabricated floors (6) to a construction site.

10. A construction method of an assembly type precast floor slab joint system according to claim 8 or 9, wherein: the two floor slabs (6) in step 3) are separated from steps 0-4).

Technical Field

The invention relates to the technical field of building structure engineering.

Background

The cast-in-place concrete floor slab has good stress performance and reliable connection, so the construction method is the most common floor slab construction method. However, the cast-in-place concrete construction process is complex, and needs to support a template and perform maintenance and other procedures on the concrete on a construction site, so that the construction period is long, the construction speed is slow, and the quality of the concrete is difficult to ensure.

Therefore, a large number of prefabricated floor slabs are introduced into the building field, but the joint stress performance of the existing prefabricated floor slab is poor, the existing cast-in-place concrete floor slab is complex in construction process, the construction speed is slow, the period is long, the maintenance condition is poor during on-site maintenance, and the quality is difficult to guarantee.

Therefore, it is highly desirable to develop a prefabricated floor slab joining construction method that can solve the above problems.

Disclosure of Invention

The invention aims to provide an assembly type prefabricated floor slab connecting system and a construction method thereof.

The technical scheme adopted for achieving the aim of the invention is that the prefabricated floor slab connecting system comprises shear-resistant steel plates, steel beams, a plurality of connecting steel bars, a plurality of sleeves and a floor slab.

The upper surface of the steel beam is vertically welded with a shear-resistant steel plate, and the longitudinal direction of the steel beam is consistent with the length direction of the shear-resistant steel plate. The shear steel plate is provided with a plurality of through holes for connecting reinforcing steel bars to pass through, and the connecting reinforcing steel bars pass through the through holes.

The two sides of the steel beam are both provided with floor slabs, a plurality of longitudinal stress steel bars which are parallel to each other are pre-embedded in the floor slabs, two ends of each longitudinal stress steel bar extend out of the floor slabs, and each longitudinal stress steel bar corresponds to a connecting steel bar which is coaxial with the longitudinal stress steel bar.

And the longitudinal stressed steel bars on each floor slab are connected with the coaxial connecting steel bars thereof through sleeves.

Further, both ends of the longitudinal stress steel bar are provided with external threads, and the length of each external thread is L. And external threads are arranged at two ends of the connecting steel bar, and the length of each external thread is L/2. The sleeve is provided with internal threads penetrating through two ends of the sleeve, the length of the sleeve is L, and L is larger than 0. The external threads of the longitudinal stressed steel bars and the external threads of the connecting steel bars are matched with the internal threads of the sleeve.

Further, the width of the shear steel plate is the same as the thickness of the floor slab. The steel beam is I-shaped steel or H-shaped steel, and the thickness of a web plate of the steel beam is the same as that of the shear-resistant steel plate.

Furthermore, the external diameter of the external thread at the two ends of the connecting steel bar is d₂Longitudinal direction ofThe external diameter of the external thread towards the two ends of the stressed steel bar is d₂The diameter of the middle section of the longitudinal stress steel bar is d, thend＞0。

Furthermore, the through hole is a regular hexagon through hole, the cross section of the middle section of the connecting steel bar is a regular hexagon, the side length of the regular hexagon is a, and a is d/2.

Further, the length L of the external thread at the two ends of the longitudinal stress steel bar is calculated as follows:

in the formula: d₁The internal diameter of the external thread at the two ends of the longitudinal stress steel bar is in mm. d₂The outer diameter of the external thread at the two ends of the longitudinal stress steel bar is in mm. f. of_yIs the tensile strength f of the reinforcing bar_yIn units of MPa N/mm²。f_vFor the shear strength f of the reinforcing bars_vIn units of MPa N/mm²。

Furthermore, the through holes in the shear steel plate are arranged in a staggered mode.

The construction method of the prefabricated floor slab connection system based on the prefabricated floor slab comprises the following steps:

1) the shear steel plate is vertically welded to the upper surface of the steel beam. The longitudinal direction of the steel beam is consistent with the length direction of the shear-resistant steel plate, and the shear-resistant steel plate is provided with a plurality of through holes for connecting reinforcing steel bars to pass through.

2) And a plurality of connecting steel bars penetrate through the through holes.

3) And hoisting the two floor slabs to two sides of the steel beam. The floor slab is characterized in that a plurality of longitudinal stressed steel bars which are parallel to each other are embedded in the floor slab, two ends of each longitudinal stressed steel bar extend out of the floor slab, and each longitudinal stressed steel bar corresponds to a connecting steel bar which is coaxial with the longitudinal stressed steel bar.

4) And connecting the longitudinal stressed steel bars on each floor slab with the coaxial connecting steel bars thereof through sleeves.

5) And pouring concrete at the joint of the floor slab and the steel beam.

Further, before the step 1), there is a step of prefabricating the floor slab, the steps are as follows:

and 0-1) binding steel bar meshes of a plurality of floors in a workshop, binding a plurality of longitudinal stress steel bars which are parallel to each other on each steel bar mesh, wherein the axial directions of the longitudinal stress steel bars are parallel to the mesh surface of the steel bar mesh, and two ends of the longitudinal stress steel bars extend out of the steel bar meshes.

And 0-2) arranging a plurality of connecting reinforcing steel bars between two adjacent reinforcing steel bar net sheets, wherein two ends of each connecting reinforcing steel bar correspond to the longitudinal stressed reinforcing steel bars coaxial with the connecting reinforcing steel bars, and two ends of each connecting reinforcing steel bar are respectively connected with the longitudinal stressed reinforcing steel bars on the two reinforcing steel bar net sheets through sleeves.

And 0-3) pouring concrete into each reinforcing mesh to form a floor slab, wherein two ends of the longitudinal stress reinforcing steel bars extend out of the floor slab.

And 0-4) after the strength of the concrete reaches the standard, disassembling the sleeve at the joint to separate the two mutually connected floor slabs.

0-5) transporting the prefabricated floors to a construction site.

Further, the two floor slabs in the step 3) are separated from the steps 0-4).

The invention has the beneficial effects that:

1. the prefabricated floor slabs are manufactured in batches in a workshop, the on-site hoisting and mechanical connection operation is convenient, the construction speed is high, and the production efficiency is improved;

2. the prefabricated concrete floor slabs are effectively connected at the joints by adopting the sleeves, so that the stress performance of the joints is ensured, and the joints are pre-connected in a workshop, so that the deviation in the field installation process is avoided, and the working efficiency is improved;

3. the sizes of the connecting pieces are strictly calculated, the middle sections of the connecting steel bars are designed to be regular hexagons, the connecting steel bars and the shear-resistant steel plates can be prevented from rotating relatively, and the construction efficiency is further improved.

Drawings

FIG. 1 is a schematic connection diagram of a prefabricated floor slab;

FIG. 2 is a connection front view of a shear steel plate and a steel beam;

FIG. 3 is a side view illustrating the connection of a shear steel plate and a steel beam;

fig. 4 is a schematic view of connecting bars.

In the figure: shear steel plate 1, through-hole 101, girder steel 2, connecting reinforcement 3, vertical atress reinforcing bar 4, sleeve 5 and floor 6.

Detailed Description

The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.